Imaging Cell Signaling in Tissues Using the IBEX Method.

The study of cell signaling within tissues can be enhanced using highly multiplexed immunohistochemistry to localize the presence and spatial distribution of numerous pathways of interest simultaneously. Additional data can also be gained by placing the identified proteins into the context of adjacent structures, stroma, and interacting partners. Here, we outline a protocol for using the recently described IBEX method on tissues. This is an open and simple cyclic immunohistochemistry approach suited to this application. We describe a simplified protocol and provide guidance on the method, using a 12-marker panel on human retina to demonstrate the approach.

Facile Tuned TSCT-TADF in Donor-Acceptor MOF for Highly Adjustable Photonic Modules based on Heterostructures Crystals.

Highly adjustable photonic modules were constructed based on the heterostructures crystals of a new series of donor-acceptor metal-organic framework (D-A MOF) featuring highly tunable thermally activated delayed fluorescence (TADF). By introducing N-phenylcarbazole and derivatives as donor guests into the acceptor host NKU-111, highly tunable through-space charge transfer based TADF could be achieved through the engineering of heavy atom effect, which result in modulatable emission wavelength (540 to 600 nm) and enhanced quantum yield (up to 30.86 %). Furthermore, by rationally integrating the D-A MOFs with distinctive emissions, rod-like heterostructures crystals featuring excitation position dependent tip emissions in wide wavelength range (495 to 598 nm) could be fabricated, which could serve as highly potential photonic modules for photonic circuit applications.

Atomic-scale insights on hydrogen trapping and exclusion at incoherent interfaces of nanoprecipitates in martensitic steels.

Hydrogen is well known to embrittle high-strength steels and impair their corrosion resistance. One of the most attractive methods to mitigate hydrogen embrittlement employs nanoprecipitates, which are widely used for strengthening, to trap and diffuse hydrogen from enriching at vulnerable locations within the materials. However, the atomic origin of hydrogen-trapping remains elusive, especially in incoherent nanoprecipitates. Here, by combining in-situ scanning Kelvin probe force microscopy and aberration-corrected transmission electron microscopy, we unveil distinct scenarios of hydrogen-precipitate interaction in a high-strength low-alloyed martensitic steel. It is found that not all incoherent interfaces are trapping hydrogen; some may even exclude hydrogen. Atomic-scale structural and chemical features of the very interfaces suggest that carbon/sulfur vacancies on the precipitate surface and tensile strain fields in the nearby matrix likely determine the hydrogen-trapping characteristics of the interface. These findings provide fundamental insights that may lead to a better coupling of precipitation-strengthening strategy with hydrogen-insensitive designs.

The relationship among integrin alpha 7, CD133 and Nestin as well as their correlation with clinicopathological features and prognosis in astrocytoma patients.

OBJECTIVE: Integrin alpha 7 (ITGA7), a potential glioma stem cell marker, regulates several other stem cell markers including CD133 and Nestin in several cancers, meanwhile its high expression is related to poor prognosis in multiple solid tumor patients. However, few studies report correlation of ITGA7 with prognosis in astrocytoma patients. Hence, this study aimed to determine the astrocytoma-tissue ITGA7, CD133 and Nestin expressions to explore their relationship and clinical value for astrocytoma management. METHODS: Totally, 124 patients with primary astrocytoma were included. Their tumor tissue ITGA7, CD133 and Nestin expressions were determined by immunohistochemical (IHC) assay and scored by intensity and density ranging from 0 to 12 points. Besides, their clinical features (such as world health organization (WHO) grade, isocitrate dehydrogenase (IDH) mutation, and adjuvant therapy etc.) were collected, also their overall survival (OS) were analyzed by follow-up data. RESULTS: The mean IHC scores for ITGA7, CD133 and Nestin were 4.9 ± 2.5, 2.1 ± 2.6 and 5.8 ± 2.6, respectively. Moreover, ITGA7 high expression correlated with absence of IDH mutation (P = 0.004), advanced WHO grade (P = 0.001) and shorter OS (P = 0.005). Besides, ITGA7 positively correlated with CD133 (P = 0.001) and Nestin (P = 0.001) expressions. Regarding CD133 and Nestin, their high expression also correlated with increased WHO grade and shorter OS. Furthermore, multivariant Cox's regression analysis displayed that only CD133 high expression (P = 0.021) could independently predict reduced OS, while ITGA7 or Nestin high expression could not independently predict that. CONCLUSION: ITGA7, CD133, and Nestin are intercorrelated, also their high expressions associate with deteriorating disease conditions and poor prognosis in astrocytoma patients.

From SARS to COVID-19: The evolving role of China-ASEAN production network.

Two decades after the severe acute respiratory syndrome (SARS) outbreak, Asia is confronted with the coronavirus disease 2019 (COVID-19) that has significantly affected the region's economy. In a novel general equilibrium model, we introduce epidemiological dynamics to the production network between China and the Association of Southeast Asian Nations (ASEAN). In this model, agents' risk-averse behavior during pandemics leads to shifting demands across economic sectors. We calibrate the model with the Organisation for Economic Co-operation and Development (OECD) inter-country input-output tables for pre-SARS and pre-COVID-19 periods and control for disease dynamics across years. Findings show that in the absence of policy interventions, China's greater significance in global value chains is associated with substantial economic impacts, within China and the ASEAN region. Our sensitivity analyses further show that China's containment efforts reduce the spillover effects on ASEAN.